Rotary swaging machines



y 22, 1956 s. SMITH ROTARY SWAGING MACHINES 2 Sheets-Sheet 1 Filed July 1, 1952 INVENTOR SAMUE L 5714/ T H BY 7M May 22, 1956 5. SMITH 2,746,321

ROTARY SWAGING MACHINES Filed July 1, 1952 2 Sheets-Sheet 2 IN V EN TOR.

SAMUEL SMITH A TTOR/VEYS 2,746,321 ROTARY SWAGING MACHINES Samuel Smith, Elmdon, England Application July 1, 1952, Serial No. 296,694

1 Claim. or. 73-22 The "present invention has relation to rotary swaging machines. Rotary swaging machines have been proposed comprising a stationary head having a rotary flywheel and trolling and limiting the movement of the hammer blocks and the present invention is particularly concerned with these cotters, keys,'wedges or like devices and their housings, the objective being to so construct the said device 1 United tates Paten 2,746,321 Patented May 22, 1956 ice In a convenient embodiment of the present invention there is provided a rectangular or oblong block of metal a having arectangular cavity onits underside. to slide within the mouth of this cavity is a channelshaped member b of sheet metal or the like and interposed between the two parts is a rubber buffer c. The block of metal a, the channel shaped sheet metal member b and the rubber buffer 0 constitute a combined silencing device and key. Provided in the side of the hammer block a' and in the side of the head e are parallel slots d e and this combined silencing device and key a, b, c, is incorporated partly within each slot, and thus housed and protected and constrained against toppling out of place. It

7 will be appreciated that its resilience permits the hammer t a fixed annulus and internal rotary head. The hammer blocks d to do their normal work (Figure l) and when there is no workpiecein the machine (Figure 2) the hammer block d is urged away from the rollers 1 so that there is nosuccession of impacts and-noise or clatter is thereby,

avoided. As previously intimated the device is applicable to either type of rotary swaging machine, that is to say, a rotary swaging machine comprising a fixed head and rotary flywheel or a rotary swaging machine comprising blocks have cylindrical inserts g of hard metal which engage the rollersf. The hammer blocks are displaced towards the rollers against the compression action of the resilient devices by means of wedges interposed between the hammer blocks and the work. Such wedges and cylinthat, primarily, they shall provide for less noise particularly when the machine is operating freely without a workpiece, which normally causes a clatter between the hammer blocks and the rollers associated with the moving part. a

According to the present invention. there is provided a rotary swaging machine having cotter, key, wedge or like device, or alternatively acotter, key, wedge or like device for use upon a rotary swaging machine which is of a resilient expansible character adapted to engage the hammer block and head and providemeans whereby the hammer block is normally held away from contact with the op erative rollers when the associate dies are not actually in operation on the workpiece.

Conveniently a channel shaped member is adapted to slide within a cavitied block with the intermediary of rubber, spring or the like and this device is inserted in registering parallel sided slots in the head and the hammer block, the arrangement being such that the latter are nor the appended explanatory drawings in which:

Fig. 1 illustrates the operative part of a rotary swaging machine incorporating silencing devices in accordance with the present invention, the workpiece being in position.

Fig. 2 is a similar view with workpiece removed, the

" silencing devices taking effect.

Fig. 3 illustrates a hammer block and shows the installation therein of the combined silencing device and key.

Fig. 4 is a view in perspective of the hammer block without the combined silencing device and key.

Fig. 5. is a transverse sectional view of the hammer blockwith the combined silencing device and key inserted in a keyway or slot in the side of the hammer block, and

Fig. 6 is an exploded view in perspective of the combined key and silencing device.

drical inserts of hard metal are well known in the art.

I claim: d d A combined retaining and retracting device for swaging machine hammer blocks which have parallel sides and are slidably fitted between parallel walls in a swaging machine head, said combined retaining and retracting device com prising a rectangular key member having a rectangular cavity extending across one side thereof, the ends of said cavity being perpendicular to the sidesof said key member, a rectangular strip havingits ends bent at right angles to the sides of said strip, the ends of said strip so bent I being fitted slidably between the ends of said cavity, and a rectangular resilient cushion fitted between the ends of said strip, the thickness of said cushion being greater than the distance to which the ends of said strip extend perpendicularly from the sides of said strip, whereby said strip is resiliently held outwardly of the side of said key member, there being keyways in the sides of said hammer "blocks and in thewalls of said swaging machine head between which said hammer blocks are slidably fitted, the keyways in the sides of said hammer blocks and the keyways in said walls of said swaging machine head being in registration when said hammer blocks are retracted, the composite thickness of said key member, said strip and said cushion being substantially equal to the width of said keyways when said hammer blocks are retracted and said keyways are in registration, said resilient cushion being confined between the back walls of registering keyways as well as between one of said key members and one of said strips, but said resilient cushionbeing capable of yielding to permit said hammer blocks to move outwardly when forced to do so incident to the insertion of work to be acted upon by said hammer blocks.

' References Cited in the file of this patent STATES PATENTS Adapted 

